Woven fabric



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. Attor ey v I Patented Apr. 16, 1946 WOVEN FABRIC William Williamson, Quorn, England,.assignor to M. Wright 8; Sons, Limited, Quorn, England Original application August 4, 1943, Serial No.

497,350. Divided and this application February 22, 1945, Serial No. 579,194. In Great Britain February 20, 1943 Claims. (01. 139-415) This invention concerns a woven fabric produced on a loom of the type in which the weft is drawn from a stationary supply thereof, and is inserted into the successively formed warp sheds, in the form of double picks, bya weft layer which operates from one of the edges. In looms of this type it is known to construct the weft layer as a needle or arm that is permanently mounted beyond one edge of the warps and is repeatedly inserted into and withdrawn from the successively formed sheds (e. g. by an oscillating or reciprocating motion), and said looms having a weft layer of this nature are therefore'termed shuttleless looms or needle looms. The said looms are particularly suitable for weaving narrow widths of fabric such as ribbons, strappin webbing (elastic and inelastic) and other similar smallwares. Primarily the invention concerns the fabric produced by the loom forming the subject of co-pending patent application No. 497,350, filed August 4, 1943, on which the present application,

is divided.

As viewed from one aspect, the present invention provides a double, woven, fabric comprising front warps interlaced with double picks of a front weft inserted from one edge, rear warps interlaced with double picks of a rear weft inserted from said edge, binding warps binding the two wefts together, and a common selvedge thread locking the bights of the double picks at th other or return edge.

The foregoing and other features of the invention set out in the appended claims are incorporated in the fabric that will now be described with reference to, the accompanying drawings in which- Figures 1 and 2 are plan views, to some extent diagrammatic, illustrating the action of the loom in producing the fabric (these figures correspond to Figs. 4 and 5 of application No. 497,350);

Figure 3 illustrates the shedding;

Figures 4 and 5 mainly diagrammatic are cross sections through the warps showing the positions thereof at two successive picking motions;

Figure 6 is a mainly-diagrammatic longitudinal section through the fabric, while Figure '1 is a diagrammatic longitudinal section through the fabric, adjacent .to the return edge, illustrating the manner in which the selvedge thread is laid through the double picks of weft threads.

The loom is equipped with a pair of simultaneously-reciprocatable weft-inserting needles l6, l6 adapted to insert their respective weft threads Wf WP (drawn from stationary weft supplies,

not shown) among the warps W in the form of double bights. Shedding takes place after each complete reciprocation of the needles, so that at that edge (the right hand edge in Figs. 1 and 2) from which the needles operate the wefts are locked. At the other, or return edge, the bights are not locked by the shedding operation but are locked by a selvedge thread S that is common to them both and is passed through the two simultaneously-inserted bights by a selvedge shuttle 30 carrying the selvedge thread supply 3|. This shuttle 39 travels in one direction through the pair of bights of weft inserted at one pick, and in the opposite direction through the pair of bights inserted at the next pick, and so on (Fig. '7). It makes its movement while the needles I6, 16' are projecting at the return edge as in Fig. l, and in order to facilitate its passage a finger 32 engages the portions of the wefts'Wj and-Wf that extend from the eyes of the needles to the fell and displaces said portions so as to enlarge the space between said portions and the left hand edge of the band of warps W.

Beating-up takes place after each pick, and th reed is indicated at I l in Figs. 1 and 2.

The shedding apparatus is arranged to produce a double shed. That is to say. at each operation the warps W are divided into at least three groups to define two sheds X, Y, between them, and the one needle it passes into the upper shed X and the other needle 16' passes simultaneously into the lower shed Y. The warps are so manipulated that they interlace with the successive double picks produced by each needle. In the construction illustrated the fabric comprises front warps F. F which interlace with the double picks of weft WI, rear warps R, R which interlace with the double picks of weft WI. two sets of binding warps B B which serve to bind the two wefts together, and also a central layer of warps G which do-not change their position and are known as the gut. These warps are controlled by seven sets of healds l-l operated in known manner from the shedding apparatus D. At each.

shedding operation the following warps change places: F with F, B with B, R with R. This will be clear from Figs. 4 and 5 which shows the passage of the warps after the insertion of the double picks of weft at the two successive shedding operations. It will be seen from Fig. 6 that the resultant fabric really consists of two fabrics bound together, with the gut G between them, by the binding warps B, B. It will, of course, be appreciated that the warps F, F need not always be maintained at the front fabric layer nor the 2, accuse front warps or rear warps as the case may he, or' they may become binding threads or the bindingthreads may become front or rear warps. However, Figs. 4-6 show a simple weave according to this invention. I

I claim:

1. A double, woven, fabric comprising front warps interlaced 'with double picks of a front weft inserted from one edge, rear warps interlaced with double picks of a rear weftinserted from said edge, binding warps binding the two weits together, and a. common selvedge thread locking the bights of the double picks at the other or return edge.

2.-A woven fabric, comprising simultaneously shot double picks of two wefts inserted from one edge, warps interlacing with the double 2 picks, and a common selvedge thread extending thr0 8h the bights of the double picks at the other edge.

3. A woven fabric according to claim 1, having a band of warps or "gut extending between the two sets of double picks.

4. A double, woven, fabric comprising front warps interlaced with double picks of a front weft inserted from one edge, rear warps interlaced with double picks of a rear weft inserted together, binding warps binding the two wefts together, and a selvedge thread locking the bights of the double picks at the other edge and extending in one direction through the bights of a front weft and a rear weft and in the opposite direction through the bights of the next rear weft and front weft and so on.

5. A woven fabric, comprising double picks of two wefts inserted from one edge, warps interlacing with each weft, binding warps binding the two wefts, gut warps lying between the two wefts, and a selvedge thread, common to both sets of zrggrps, extending through the bight at the other e. WILLIAM WILLIAMSON. 

